Freescale Semiconductor, Inc.
EPROM/OTPROM (PROM)
VR1 NMA0512S
DC-DC CONVERTER
(OPTIONAL)
S1
OFF
ON
A
+5 V
1
5
R15
10 K
V
0 V
CC
+
C1
P1
100 µF
–V
GND
2
+V
6
+5 V
+12 V
–12 V
4
2
3
5
1
OFF
ON
4
40
VDD
+12 V
39
38
OSC1
OSC2
B
C
–12 V
3
V
V
PP
PP
D1
1N4001
V
PP
GND
1
2
RESET
IRQ
D
E
F
G
H
I
+5 V
16
9
37
36
35
34
33
32
31
P3
TCAP
PD7
30
3
2
14
15
PD1
RXD
TXD
3
2
PD1
PD0
TCMP
PD5
29
11
10
9
PD0
A0
10
9
(A0)
(A1)
(A2)
(A3)
(A4)
(A5)
(A6)
(A7)
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
U1
U4
MC145406
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PD4
2764
J
A1
A2
A3
A4
A5
A6
8
1
+5 V
8
PD3
K
L
+12 V –12 V
1
8
7
PD2
V
PP
26
27
28
6
7
U2
NC
40-PIN DIP
SOCKET
5
6
PGM
5
4
23
22
CTS
V
CC
PC5
PC6
M
5
6
3
4
C5
0.1 µF
DSR
DCD
DTR
GND
GND
A7
N
(A8)
28
27
26
25
24
8
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
11 (D0)
12 (D1)
12
13
14
15
16
17
18
19
20
PC0
PC1
PC2
PC3
PC4
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
D0
D1
CE
20
1
(A9)
(A8)
(A9)
(A10)
25
24
21
(D2)
(D3)
13
15
(A10)
(A11)
(A12)
A8
D2
D3
7
A9
16 (D4)
A10
A11
A12
OE
D4
D5
(A11) 23
(D5)
(D6)
17
18
(A12)
2
D6
D7
21
19 (D7)
22
PC7
O
V
GND
SS
14
20
Notes:
1. The asterisk (*) denotes option T
command only.
2. Unless otherwise specified, resistors are in ohms,
±5% 1/4 W; capacitors are in µF; voltages are dc.
P
Q
(ENABLE)
3. Device type numbers shown in circuit are for
reference only. Device type number varies
with manufacturer.
R
S
Figure 9-2. PROM Programming Circuit
Technical Data
106
MC68HC705C8A — Rev. 3
EPROM/OTPROM (PROM)
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